The purpose of this study is to determine the role of Heart rate variability biofeedback (HRV-BF) in asthma management as either a controller (alternative) or bronchodilator (complementary) treatment, with respect to the current treatment of choice, ICS therapy, using different methods from participants that demonstrated clinically significant improvement in asthma outcomes in the investigator's previous research (1), and adding a second site not involved in the investigator's previous work.